1- Used Colt M16A4 upper. The upper comes as pictured with NO BOLT, BC, or CH. I have fired exactly 50 rounds of MK 262 ammo through the upper with no issues. This is the same upper I was advertising in the NEW AR PARTS section, but I just had to try it out. The pictures will do the rest of the talking. I am asking $700 shipped CONUS. I accept USPS money orders only. If you have any questions email me at scbh@mebtel.net or call me at 919 616 3498. Thank you for looking.